curl --request GET \
  --url https://api.loyaltylion.com/v2/customers \
  --header 'Authorization: Bearer <token>'

{
  "customers": [
    {
      "id": 123,
      "merchant_id": "<string>",
      "email": "<string>",
      "points_approved": 123,
      "points_pending": 123,
      "points_spent": 123,
      "properties": {},
      "metadata": {
        "shopify_source_url": "<string>"
      },
      "rewards_claimed": 123,
      "blocked": true,
      "guest": true,
      "enrolled": true,
      "enrolled_at": "<string>",
      "referral_id": "<string>",
      "referred_by": {
        "id": 123,
        "merchant_id": "<string>"
      },
      "loyalty_tier_membership": {
        "started_at": "<string>",
        "expires_at": "<string>",
        "manual": true,
        "loyalty_tier": {
          "id": 123,
          "name": "<string>",
          "number": 2,
          "default": true,
          "hidden": true,
          "lower_bound": "<string>",
          "upper_bound": "<string>",
          "position": 1
        }
      },
      "insights_segment": "At Risk",
      "birthday": "<string>",
      "referral_url": "<string>",
      "linked_merchant_ids": [
        "<string>"
      ],
      "created_at": "<string>",
      "updated_at": "<string>"
    }
  ],
  "cursor": {
    "prev": "<string>",
    "next": "<string>"
  }
}